2FZA:
reference: Crystal structure of d(gcGXGAgc) with X=G: a mutation at X is possible to occur in a base-intercalated duplex for multiplex formation., Kondo J, Ciengshin T, Juan EC, Sato Y, Mitomi K, Shimizu S, Takenaka A, Nucleosides Nucleotides Nucleic Acids. 2006;25(4-6):693-704. PMID: 16838856

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